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<pre><span class="sourceLineNo">001</span>package org.triplehelix.lib;<a name="line.1"></a>
<span class="sourceLineNo">002</span><a name="line.2"></a>
<span class="sourceLineNo">003</span>import edu.wpi.first.wpilibj.networktables2.util.List;<a name="line.3"></a>
<span class="sourceLineNo">004</span><a name="line.4"></a>
<span class="sourceLineNo">005</span>/**<a name="line.5"></a>
<span class="sourceLineNo">006</span> *<a name="line.6"></a>
<span class="sourceLineNo">007</span> * @author robotics<a name="line.7"></a>
<span class="sourceLineNo">008</span> */<a name="line.8"></a>
<span class="sourceLineNo">009</span>public class RollingAverager {<a name="line.9"></a>
<span class="sourceLineNo">010</span>    <a name="line.10"></a>
<span class="sourceLineNo">011</span>    private List values = new List();<a name="line.11"></a>
<span class="sourceLineNo">012</span>    private int numValues;<a name="line.12"></a>
<span class="sourceLineNo">013</span>    <a name="line.13"></a>
<span class="sourceLineNo">014</span>    /**<a name="line.14"></a>
<span class="sourceLineNo">015</span>     * Initialize an averager that will hold the specified number of values.<a name="line.15"></a>
<span class="sourceLineNo">016</span>     * @param numValues The number of entries the averager will store.<a name="line.16"></a>
<span class="sourceLineNo">017</span>     */<a name="line.17"></a>
<span class="sourceLineNo">018</span>    public RollingAverager(int numValues) {<a name="line.18"></a>
<span class="sourceLineNo">019</span>        if (numValues &lt;= 0) {<a name="line.19"></a>
<span class="sourceLineNo">020</span>            throw new IllegalArgumentException("Cannot have 0 or fewer values.");<a name="line.20"></a>
<span class="sourceLineNo">021</span>        }<a name="line.21"></a>
<span class="sourceLineNo">022</span>        this.numValues = numValues;<a name="line.22"></a>
<span class="sourceLineNo">023</span>    }<a name="line.23"></a>
<span class="sourceLineNo">024</span>    <a name="line.24"></a>
<span class="sourceLineNo">025</span>    /**<a name="line.25"></a>
<span class="sourceLineNo">026</span>     * Initialize an averager that will hold the specified number of values and initialize the values to the specified value.<a name="line.26"></a>
<span class="sourceLineNo">027</span>     * @param numValues The number of entries the averager will store.<a name="line.27"></a>
<span class="sourceLineNo">028</span>     * @param initialValue The value to initialize the averager to.<a name="line.28"></a>
<span class="sourceLineNo">029</span>     */<a name="line.29"></a>
<span class="sourceLineNo">030</span>    public RollingAverager(int numValues, double initialValue) {<a name="line.30"></a>
<span class="sourceLineNo">031</span>        this(numValues);<a name="line.31"></a>
<span class="sourceLineNo">032</span>        for (int i = 0; i &lt; numValues; i++) {<a name="line.32"></a>
<span class="sourceLineNo">033</span>            values.add(new Double(initialValue));<a name="line.33"></a>
<span class="sourceLineNo">034</span>        } <a name="line.34"></a>
<span class="sourceLineNo">035</span>    }<a name="line.35"></a>
<span class="sourceLineNo">036</span>    <a name="line.36"></a>
<span class="sourceLineNo">037</span>    /**<a name="line.37"></a>
<span class="sourceLineNo">038</span>     * Add a new value to the averager.<a name="line.38"></a>
<span class="sourceLineNo">039</span>     * @param value The value to add to the averager.<a name="line.39"></a>
<span class="sourceLineNo">040</span>     */<a name="line.40"></a>
<span class="sourceLineNo">041</span>    public void addValue(double value) {<a name="line.41"></a>
<span class="sourceLineNo">042</span>        if (values.size() &gt;= numValues) {<a name="line.42"></a>
<span class="sourceLineNo">043</span>            values.remove(0);<a name="line.43"></a>
<span class="sourceLineNo">044</span>        }<a name="line.44"></a>
<span class="sourceLineNo">045</span>        values.add(new Double(value));<a name="line.45"></a>
<span class="sourceLineNo">046</span>    }<a name="line.46"></a>
<span class="sourceLineNo">047</span>    <a name="line.47"></a>
<span class="sourceLineNo">048</span>    /**<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * Get the current average of the averager.<a name="line.49"></a>
<span class="sourceLineNo">050</span>     * @return The current average.<a name="line.50"></a>
<span class="sourceLineNo">051</span>     */<a name="line.51"></a>
<span class="sourceLineNo">052</span>    public double getAverage() {<a name="line.52"></a>
<span class="sourceLineNo">053</span>        double sum = 0;<a name="line.53"></a>
<span class="sourceLineNo">054</span>        <a name="line.54"></a>
<span class="sourceLineNo">055</span>        for(int i = 0; i &lt; values.size(); i++) {<a name="line.55"></a>
<span class="sourceLineNo">056</span>            sum += ((Double) values.get(i)).doubleValue();<a name="line.56"></a>
<span class="sourceLineNo">057</span>        }<a name="line.57"></a>
<span class="sourceLineNo">058</span>        return sum / values.size();<a name="line.58"></a>
<span class="sourceLineNo">059</span>    }<a name="line.59"></a>
<span class="sourceLineNo">060</span>}<a name="line.60"></a>




























































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